1.   Constraints are specified by preference rules.

2.   Preference rules give guidance on how to choose between alternative possible grouping structures.

3.   Here, personal preference rules.

4.   Lamy said he had clearly indicated that the EU was in the process of framing new trade preference rules, which will not be unfavorable to India.

5.   Maran also raised the issue of non-tariff barriers, especially to agricultural exports from India and the trade preference rules that harmed Indian exporters.